Mailing Address

Corstone
250 Camino Alto Suite 100-a
Mill Valley, CA 94941

Corstone is a tax exempt organization located in Mill Valley, California. Donations to Corstone are tax deductible. This organization has been in operation for 46 years, which makes it older than other nonprofits in the state. Corstone has significantly larger assets when compared to other nonprofits in California. This organization last reported to the IRS significantly more income than average compared to other nonprofits in California.

Classification and Focus

EIN
94-2393629
Organization Code
Code 5: Association
Deductibility Code
Code 1: Contributions are deductible.
Affiliation Code
Code 3: Independent
Subsection and Classification Codes
Activity Codes
  • Code 161: Scientific research (diseases)
NTEE Common Code
Code F: Mental Health, Crisis Intervention
NTEE Code
Code F50: Addictive Disorders N.E.C.
Foundation Code
Code 00: All organizations except 501(c)(3)
Exempt Organization Status Code
Code 01: Unconditional Exemption

Financials

Ruling Date
1977-05-01
Accounting Month
December
2013 Income
$864,493
Total Assets
$458,037
Form 990 Revenue Amount
$829,296
Filing Requirement Code
Code 01: 990 (all other) or 990EZ return
PF Filing Requirement Code
Code 0: No 990-PF return